#include"csapp.h"


void echo(int connfd){
    size_t n;
    char buf[MAXLINE];
    rio_t rio;
    Rio_readinitb(&rio,connfd);
    while((n==Rio_readlineb(&rio,buf,MAXLINE))!=0){
        printf("server received %d bytes\n",n);
        Rio_writen(connfd,buf,n);
    }

}
